i#1793 suite cleanup: disable failing tests in long suite
i#1793 suite cleanup: disable failing tests in long suite

Disables failing tests in the long suite by collapsing the runs down to
just ^common.  Disables the tracedump runs as well as they fail even on
^common.  This gets the long suite to green status.

i#1807 covers fixing the failing tests and re-enabling them.

Fixes #1793

Review-URL: https://codereview.appspot.com/270790044

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